1 files changed, 4 insertions, 2 deletions
diff --git a/lib/internal/once.js b/lib/internal/once.js
index 1293d5e..10ab26b 100644
--- a/lib/internal/once.js
+++ b/lib/internal/once.js
@@ -1,8 +1,10 @@
 export default function once(fn) {
-    return function (...args) {
+    function wrapper (...args) {
         if (fn === null) return;
         var callFn = fn;
         fn = null;
         callFn.apply(this, args);
-    };
+    }
+    Object.assign(wrapper, fn)
+    return wrapper
 }